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perspective

Since17.5

matrix  perspective(float zoom, float image_aspect, float pixel_aspect, float clip_near, float clip_far)

matrix  perspective(float zoom, float image_aspect, float pixel_aspect, float clip_near, float clip_far, vector4 window)

Create a perspective projection matrix with the given parameters. This can be used to project points onto the so-called NDC coordinates of a camera.

To make a single transform from world space to NDC space given a camera matrix and a projection matrix, you would use, worldToNDC = worldToCamera * projection;

zoom

The zoom for the lens. Sometimes the zoom is expressed in terms of focal and aperture. In this case, zoom = focal/aperture.

arg:image_aspect

The aspect ratio of the image. Sometimes the image_aspect is expressed in terms of xres and yres. In this case, image_aspect = xres / yres.

arg::clip_near

The near clipping plane.

arg::clip_far

The far clipping plane.

arg::window

The offset for the projection window encoded in a vector4. window.x and window.y are the window min xy coordinates and window.z, window.w are the window max xy coordinates. This argument is optional and defaults to {0,0,1,1} when not given.